Citazione Stile APA (7a Edizione)

ebrary, Inc, Perrin, W. F., Würsig, B. G., & Thewissen, J. G. M. (2009). Encyclopedia of marine mammals (2nd ed.). Academic.

Citazione stile Chigago Style (17a edizione)

ebrary, Inc, W. F. Perrin, Bernd G. Würsig, e J. G. M. Thewissen. Encyclopedia of Marine Mammals. 2nd ed. London: Academic, 2009.

Citatione MLA (9a ed.)

ebrary, Inc, et al. Encyclopedia of Marine Mammals. 2nd ed. Academic, 2009.